<template>
    <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图区域 -->
      <el-card style="height: 560px;overflow: scroll;overflow-x: auto">
        <!--添加角色按钮-->
        <el-row>
          <el-col>
            <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
          </el-col>
        </el-row>
        <!--角色列表区域slot-scope="scope"-->
        <el-table :data="rolelist" border stripe >
          <!--展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row v-for="(item1, i1) in scope.row.children"
                      :key="item1.id" :class="['dbbottom', i1 ==0 ? 'dbtop' : '', 'vcenter']">
                <!--渲染一级权限-->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--二级和三级权限-->
                <el-col :span="19">
                  <!-- 通过for循环嵌套渲染二级权限-->
                  <el-row v-for="(item2, i2) in item1.children" :key="item2.id"
                          :class="[i2 ==0 ? '' : 'dbtop', 'vcenter']">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                        {{item2.authName}}
                      </el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id"
                              closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <!--索引列-->
          <el-table-column type="index" label="#"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
               <el-button size="mini" type="primary" icon="el-icon-edit"
                          @click="showEditDialog(scope.row.id)">编辑</el-button>
               <el-button size="mini" type="danger" icon="el-icon-delete"
                          @click="removeUserById(scope.row.id)">删除</el-button>
               <el-button size="mini" type="warning" icon="el-icon-setting"
               @click="showSetRightDialog(scope.row)">分配</el-button>
            </template>
          </el-table-column>

        </el-table>
      </el-card>

      <!-- 添加用户的对话框 -->
      <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
        <!-- 内容主体区域 -->
        <el-form :model="addForm" ref="addFormRef" :rules="addFormRules" label-width="70px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
      </el-dialog>

      <!--修改角色的对话框-->
      <el-dialog
        title="修改用户"
        :visible.sync="editDialogVisible"
        width="50%" @close="editDialogClosed"
      >
        <el-form :model="editForm" ref="editFormRef" :rules="addFormRules" label-width="70px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" >
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
      </el-dialog>

      <!--权限分配的对话框-->
      <el-dialog
        title="分配权限"
        :visible.sync="showSetRightDialogVisible"
        width="50%" @close="showSetRightDialogClosed"
        >
        <!--树形控件-->
        <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>

    </div>
</template>

<script>
  export default {
    name: 'Roles',
    data() {
      return {
        //所有角色列表数据
        rolelist: [],
        //控制分配权限对话框的显示于隐藏
        showSetRightDialogVisible: false,
        //获取所有的权限数据 点击那个权限分配就获取哪个的
        rightsList: [],
        //树形控制的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        //默认选择的节点id值数组
        defKeys:[],
        //roleId 用于指定给那个角色分配权限
        roleId:'',
        // 控制添加用户对话框的显示与隐藏
        addDialogVisible: false,
        // 添加用户的表单数据
        addForm: {
          roleName: '',
          roleDesc: '',
        },
        // 添加表单的验证规则对象
        addFormRules: {
          roleName: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            {
              min: 2,
              max: 10,
              message: '用户名的长度在2~10个字符之间',
              trigger: 'blur'
            }
          ]
        },
        // 控制修改用户对话框的显示于隐藏
        editDialogVisible: false,
        //查询到的用户信息对象
        editForm: {},
      }
    },
    created () {
      this.getRolesList()
    },
    methods: {
      //获取所有角色列表
      async getRolesList() {
        const {data: res} = await this.$http.get('roles')

        if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！ ')

        this.rolelist = res.data
        // console.log(this.rolelist)
      },
      // 监听添加角色对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      // 点击按钮，添加新角色
      async addUser() {
        const {data: res} = await this.$http.post('roles',this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加新角色失败！')
        this.$message.success('添加角色成功！')
        this.addDialogVisible = false
        this.getRolesList()
      },
      //展示编辑角色的对话框 在编辑角色之前要先通过id查询该编辑角色的内容
      async showEditDialog(id) {
        const {data: res} = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('查询用户信息失败！')
        }
        this.editForm = res.data
        this.editDialogVisible = true
        console.log(this.editForm)
      },
      // 监听修改用户对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      //修改用户信息并提交
      async editUserInfo() {
        const {data: res} = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        console.log(this.editForm.id)

        if (res.meta.status !== 200) {
          return  this.$message.error('更新角色信息失败！ ')
        }
        //关闭对话框
        this.editDialogVisible = false
        //刷新数据列表
        this.getRolesList()
        //提示修改成功
        this.$message.success('更新角色信息成功！ ')
      },
      //根据id删除对应的用户信息
      async removeUserById(id) {
        //弹窗询问用户是否删除数据
        const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch( err => err)

        //如果用户确认删除，则返回值为字符串 confirm
        //如果用户取消了删除，则返回值为字符串 cancel
        //console.log()
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }

        const {data: res} = await this.$http.delete('roles/' + id)

        if (res.meta.status !== 200) {
          return this.$message.error('删除用户失败！')
        }
        this.$message.success('删除用户成功！')
        this.getRolesList()
      },
      //根据id删除三级权限
      async removeRightById(role,rightId) {
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch((err) => err);

        if (confirmResult !=='confirm') return this.$message.info('取消了删除！')

        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

        if (res.meta.status !== 200) return this.$message.error('删除权限失败！')

        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role) {
        //获取所有权限的数据
        const {data: res} = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
        this.rightsList = res.data
        //获取三级节点的id
        this.getLeafKeys(role,this.defKeys)
        //roleId用给点开分配权限对话框的角色分配权限 要在点开时获取该角色id
        this.roleId = role.id
        this.showSetRightDialogVisible = true
      },
      //通过递归的形式，获取角色下所有三级权限的id，并保存到 defkeys 数组中
      getLeafKeys(node,arr) {
        // 如果当前node节点不包含children属性，则不是三级节点
        if (!node.children) return arr.push(node.id)

        node.children.forEach(item => {
          this.getLeafKeys(item, arr)
        })
      },
      //监听分配权限对话框的关闭事件
      showSetRightDialogClosed() {
        this.defKeys = []
      },
      //点击确定为角色分配选中的权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]

        const idStr = keys.join(',')

        const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})

        if (res.meta.status !== 200) return this.$message.error('分配权限失败！')

        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.showSetRightDialogVisible = false
      }
    },
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .dbtop {
    border-top: 1px solid #eee;
  }

  .dbbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }

</style>
